Senior Principal Systems Administrator - Military veterans preferred

ManTech (


  full-time   employee   contract

United States

Entering ManTech’s 50th year, we hold the distinct honor of being named a “Top 100 Global Technology Company” by Thomson Reuters. We have earned this and many other accolades over the years for our dedication to serving the missions of our nation’s most important customers: U.S. Intelligence, Defense and Federal Civilian agencies. All know us as a trusted partner offering best-in-class solutions in cyber, data collection & analytics, enterprise IT, and systems and software engineering tailored to meet their specific requirements.

Become an integral part of a diverse team in the Mission, Cyber and Intelligence Solutions (MCIS) Group. Currently, ManTech is seeking a motivated, mission oriented CNO Developer in the Hanover, Maryland area, with strong Customer relationships. At ManTech, you will help protect our national security while working on innovative projects that offer opportunities for advancement.

The Security Solutions Division provides cyber solutions to a wide range of Defense and Intelligence Community customers. This division consists of a team of technical leaders that deliver advanced technical solutions to government organizations. Our customers have high standards, are technically adept, and use our products daily to support their mission of protecting national security. Our contributions to our customer’s success is driving our growth.

Job Duties and Responsibilities
As a Senior Systems Administrator you will perform and lead system administration functions for Linux-based machines and provide system support for a large scale network. Must Be a Self-starter with a background in VMWare, Hardware, Networking, Unix/Linux systems administration and configuration. Details of position below:

Perform Linux administration for modern flavors of Linux (mainly CentOS)
Create and harden custom linux images
Support NIS/LDAP authentication environments
DNS, DHCP, NFS, automounting and other Linux server support
Patching and remediation of Linux systems
Management and operation of VMware vSphere suite of products
Netapp configuration and administration
vSphere VM creation, backup, restoration and upgrades
vSphere/ESXi patching and maintenance
Syslog server configuration and maintenance
Configure TLS on web servers and applications
Install and configure server certificates and PKI authentication
Integrate, install, configure, upgrade, compile all type of COTS/GOTS software
Troubleshoot and resolve complex problems
Make recommendations for purchases
Develop and implement enterprise backup/recover strategies
Configure and maintain seamless NFS/CIFS access to home directories and shares

Desired skills:

Prefer security+
Hardening Linux systems
Nessus scans and remediation
Bash, Perl or python scripting
Active Directory - Windows Server 2003/2008
Niagara Files
McAfee EPO
FOSS monitoring and metrics tool suites
Net Backup and NetApp SMVI backup
Cisco UCS platforms
Solid troubleshooting skills and attention to detail
Patching, backups, software installation and maintenance

Desired experience:
• 10 years related experience

Clearance Requirements:
• TS/SCI w/Poly